Swivel joint



Feb. 23 ,1926. 1,574,187

' C. S. CRICKMER SWIVEL JOINT Filed May 15, 1924 Y 2 SheetsSheet 1 y(JO/(Amen Feb. 3 1926.. 1,574,187

C. S. CRICKMER SWIVEL JOINT Filed May 1 92 '2 Sheets-Sheet 2 PatentedFeb. 23, 1926.

UNITED STATES 1,574,187. PATENTAI-OVFFICVE.

CHARLES S. CRICKMEB, F DALLAS, TEXAS, ASSIGNOR TO THE GUIBERSON COR-POBATION, OF DALLAS, TEXAS, A CORPORATION OF DELAWARE.

SWIVEL JoiN'r.

Application filed May 15, 1924. Serial No. 713,408.

To all whom it may concern:

Be it known that I, CHARLES S. CRIOKMER, citizen of the United States ofAmerica, residing at Dallas, in the county of Dallas and State of Texas,have invented certain new and useful Improvements in Swivel Joints, ofwhich the following is a specification. I l

This invention relates to new and useful 1 improvements in swiveljoints.

In sucker rods for pumps and other elongated working elements there isconsiderable torsional movement, which causes an undue strain andexcessive wear as well as interfering with a free and easy operation.

The object of the invention is to provide a joint that may be connectedin the rod or other member and which includes a swivel whereby theportions which are connected by the joint may undergo independentrotation and thus the twisting of one portion will not be communicatedto the other portion.

A particular object is to provide a joint in which the swivel is formedin a simple man ner and without the use ofinternal screw threads andnuts, and with a few numberof parts. r

Another object is to provide a swlvel joint arranged so that its endsmay be formed to couple with any style of connection, whether threadedpin or box and either tapered or straight.

A construction designed'to carry out the invention will be'hereinafterdescribed together with other features of the invention.

The invention will be more readily understood from a reading of thefollowing specification and by reference to the accompanying drawings,in which an example of the invention is shown, and wherein:

Fig. 1 is an elevation of a swivel joint constructed in accordance withmy invention,

Fig. 2 is a vertical sectional view of the same,

Fig. 3 is a plan view, Fig. 4 is a cross-sectional view on the line 44of Fig. 2,

Fig. 5 is a detail of one of the sections of the lower coupling member,and

Figs. 6 and 7 are elevations of modified forms.

In the drawings the numeral 10 designates an upper coupling member and11 a lower coupling member. In Figs. 1 to 4. I have shown the uppermember formed with a box having a screw threaded socket 12. The uppermember has an annular depending mar ginal flange 13. The inner face orperiphery of the flange isb'evell'ed. An axial shank or mandrel 14depends from the upper member and is surrounded by an annular seat 15contiguous to the bevelled flange 18. The mandrel has an integral collar16 at its lower end forming a head and with its upper surface bevelled.Of course it would be possible to form the mandrel separately and attachit to the upper member in asuitable manner, likewise the collar.

One'of the very important features of the invention is the lower memberand its manner of engagement with the mandrel. In order to obviate nuts,bolts, screws, clamps and the like, the member is made in complenientaryhalves or sections A and B, semicircular in CTOSS-SQOJEIOIL. Forconvenience the lower member will be described as an 7 entirety. Themember 11 has an axial bore 17 in which the mandrel let has a turningfit. At the lower end the bore is formed with a countersunk groove 18shaped to receive the collar 16.

At the upper end the bore issurrounded by an annular boss 19 fitting inthe seat 15 and having a bevelled periphery contacting with the bevelledface of the flange 13. The boss is surrounded at its base by anoutwardly directed flat shoulder 20 which bears against the bottom ofthe flange 13. It will be seen that the upper end of the lower memberhas a turning or rotating fit in' and against the lower end of the uppermember. so that either member has ample bearing surfaces for taking theend or longitudinai thrust.

The lower end of the lower member has a reduced screw threaded pin 21.The upper member 10 has diametrically opposite wrench faces 22; whilethe lower member 11 has similar faces 23. As before stated, the

lower member 11 is split into two vertical sections on a diametricalvertical plane.

This enables it to be assembled, whereby its boss 19 is engaged in theseat 15 and it is suspended on the mandrel 141. It will be seen thatwhen the pin is screwed into a socket (not shown) as on the upper end ofa length of sucker rod, the sections will be fastened together. This istrue because the boss prevents lateral displacement of the member.Vilhileheld. together the members are free to undergo independentrotation.

In Fig. 6 I have shown the uppermember IOhaving a taperedv socket 12While the lower member hastaperedj pin 21. In Fig. 7 I have shown" theupper member provided with a pin 10 as Well as the lower member. It willbe seen that the swivel joint can be made in various Ways and ;is ofsimple and durable construction.

. l/VhatIclaim, is I I I p 1, In a rod joint, a swivel member having arod coupling member at, one end and. a mandrel; at its opposite endsurrounded by aQflange, fixed; relatively: to the mandrel. and extendingparallel to its axis to. form a recess, and. a cooperating memberformed; in

separable sectionsand with. a. flange toenter ther-ecess of the swivelmember and means.

interlockingxvith said mandrel, the opposite. end: of said cooperatingmember being. adapted to receive arod: coupling. toprevent lateral;displaceinentv of the, sections.

2. In a rod joint,a.swivelymember,having.

arodicoupling. at oneend anda headedmandrel at its opposite end'surrounded; by a flange fixed relatively tothe mandrel. and;

forming an annular recessnhavingan inclined: outer wall, and acooperating'member' formed; in separable. sections each. having. a.

flange to, fit said recess. and a bore termihating in. an enlarged seatto receive. the.

head oft-he mandrel, the oppositeend Dirt-he cooperating member beyondsaid. seat: being adapted; to. receilve afirod; coupling to pre-.

vent lateral displacement, of the. sections.

scribed; comprising a. couplingmember having at oneen'd' a mandrelsurrounded by a flange fixed, relatively .to the mandrel and:

extendingparallel to its axis. to. form a recess, and a1 cooperatingmember formed inseparable sections having a flange to. enter the recessof; the couphngmember. to resist her, a, mandrel depending o. A swiveljoint of the chancter de-V- having, an. axialborefor receiving and:int-erlocking. with the mandrel, an: upstanding boss in eachsection forengaging in. the flange. of. the upper member to. preventlateral-displacement of .t] 1e;v sectionsof the-lower member andcoupling means/for clamping the lower ends or said sections againstlaterah movement.

5. In a rod joint-,zu swinehmemberhaving. a. rod coupling member at. oneend: and. a mandrel; at its oppositerend surrounded; by a flange fixedrelatively to the. mandrel and;

extending parallel toitsr axisto. form a.,r.e-.

cess, and a. cooperating member termed in. separable, sections.andzwith; means to enter the recess. of the SWlSEQlIIlQHlbGI andmeansengaging with saidmandrel, the oppositeendi of said" cooperating memberbeing.- adapted to; receive a; rod. coupling I to prevent latenal:displacement of the sections.

(3. 111.!Lk1i0ilij0lilt, a swivel; member having.

ajrod conplingmexnber at one-1 end and; a mandrel, at its opposite endsurrounded by.

a. Wall fixed: relatively. to, the. mandreli to; prior vide a. recess,and; a cooperating member formed in separable sections embracingsaithmandrel, with; one. end disposed; in said; recess, and the opposite endadaptedato be I em braced by zu1'ocl.coi1p1i11g,; to prenent lateral:displacement ofithe. section's.v

In testimony whereof I aflix my signature.

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